A flammable gas detector threshold calibration test box

Abstract

This utility model provides a threshold calibration test box for a combustible gas detector, including a first connecting pipe and a second connecting pipe, and C-shaped pipes installed at both ends of the first and second connecting pipes. The first connecting pipe has an opening, and a sealing door is hinged to the opening. A placement rack is installed inside the first connecting pipe, and a support bracket for inspecting a circuit board is slidably installed on the placement rack. A fixing plate is installed inside the second connecting pipe, and a through hole is opened on the fixing plate. A fan is installed on the fixing plate, and the fan blades are aligned with the through hole. A sealing shell for a gas concentration detector is installed on the second connecting pipe. A placement rack for holding the gas concentration analyzer is installed between the first and second connecting pipes. This utility model allows for uniform gas flow within the channel, thereby avoiding errors in the detection results and unpredictable situations, and improving detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of detection technology, and in particular to a threshold calibration test box for a combustible gas detector. Background Technology

[0002] Combustible gas detectors play a crucial role in monitoring the concentration of combustible gases in the environment in real time. When the concentration reaches a certain threshold, they issue an alarm promptly, effectively preventing safety accidents such as fires and explosions. However, the accuracy and reliability of combustible gas detectors largely depend on the precision of their response threshold.

[0003] The circuit boards used in existing gas detectors exhibit uneven gas flow during testing in the threshold calibration box (acrylic gas distribution box), leading to errors in detection results, unpredictable situations, and low detection efficiency. Utility Model Content

[0004] In view of this, the present invention aims to provide a combustible gas detector threshold calibration test box to solve or alleviate the technical problems existing in the prior art.

[0005] The technical solution of this utility model embodiment is implemented as follows: 1. A combustible gas detector threshold calibration test box, including a connecting pipe one and a connecting pipe two, and C-shaped pipes installed at both ends of the connecting pipe one and the connecting pipe two, characterized in that the connecting pipe one has an opening, a sealing door is hinged at the opening, a placement rack is installed inside the connecting pipe one, and a support bracket for inspecting the circuit board is slidably installed on the placement rack.

[0006] A fixing plate is installed inside the second connecting pipe. A through hole is opened on the fixing plate. A fan is installed on the fixing plate. The fan blades are aligned with the through hole. A sealing shell for a gas concentration detector is installed on the second connecting pipe. A mounting rack for placing the gas concentration analyzer is installed between the first connecting pipe and the second connecting pipe.

[0007] In the above embodiment: the connecting pipe one, the connecting pipe two, and the C-shaped pipes at both ends of the connecting pipe one and the connecting pipe two are arranged in an elliptical shape.

[0008] In the above embodiments: the first connecting pipe and the C-shaped pipe, and the second connecting pipe and the C-shaped pipe are connected by bolts, and a sealing gasket is installed at the connection.

[0009] In the above embodiments: an isolation plate is installed at the connection between the first connecting pipe and the C-shaped pipe, at the connection between the second connecting pipe and the C-shaped pipe, and inside the second connecting pipe. The isolation plate has an installation hole, and a ventilation pipe is installed in the installation hole.

[0010] In the above embodiment: there are two openings on the connecting pipe, and the sealing door is colorless and transparent.

[0011] In the above embodiments: the support brackets are stacked, and the support brackets are provided with multiple slots for placing circuit boards. The support brackets are communicatively connected to an external detection system.

[0012] In the above embodiment: the sealing shell is provided with a gas inlet, and a gas supply pipe connected to the gas cylinder is installed on the gas inlet.

[0013] In the above embodiment: the connecting pipe is provided with an exhaust port and an air inlet, and a solenoid valve is installed on both the exhaust port and the air inlet.

[0014] In the above embodiment: a protective shell 1 for protecting the communication cable is installed on the end face of the connecting pipe 1 away from the sealing door, and a protective shell 2 for the connection position between the air inlet pipe and the connecting pipe 2 is installed on the connecting pipe 2.

[0015] In the above embodiment: a bracket for placing a blower is installed on the second connecting pipe, and the blower installed on the bracket is connected to the air inlet.

[0016] The present invention has the following advantages due to the adoption of the above technical solution:

[0017] This invention improves detection efficiency by using multiple card slots.

[0018] This invention utilizes a fan to propel gas through the through-hole of a fixed plate into a circular pipe connecting pipe two, then to a C-shaped pipe connecting pipe one, then to a C-shaped pipe connecting pipe two, and finally to a C-shaped pipe connecting pipe two. The fan inside connecting pipe two is activated to ensure that the gas concentration is uniform as it passes through the circuit board.

[0019] This invention improves the efficiency of gas replacement by using a blower and a solenoid valve in combination to exhaust the existing gas in the flow channel and introduce the required gas.

[0020] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a schematic diagram of the internal structure of the connecting pipe II of this utility model;

[0025] Figure 4 This is a schematic diagram of the mounting structure of the placement rack of this utility model;

[0026] Figure 5 This is a schematic diagram of the support structure of this utility model.

[0027] Figure label:

[0028] 1. Connecting pipe one; 2. Connecting pipe two; 3. C-shaped pipe; 4. Sealing door; 5. Placement rack; 6. Support bracket; 7. Fixing plate; 8. Sealing shell; 9. Placement rack; 10. Isolation plate; 11. Ventilation pipe; 12. Slot; 13. Gas inlet; 14. Exhaust outlet; 15. Air inlet hole; 16. Protective shell one; 17. Protective shell two; 18. Bracket. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0030] It is important to note that terms such as "first," "second," "symmetric," and "array" are used only to distinguish between descriptive and positional descriptions and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified with terms such as "first" or "symmetric" may explicitly or implicitly include one or more of that feature; similarly, when the quantity of certain features is not limited by words such as "two" or "three," it should be noted that such features also explicitly or implicitly include one or more features.

[0031] In this invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," and "fixation" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the accompanying drawings and specific circumstances.

[0032] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0033] like Figure 1-5 As shown, this utility model embodiment provides 1. a combustible gas detector threshold calibration test box, including a connecting pipe 1 and a connecting pipe 2, and C-shaped pipes 3 installed at both ends of the connecting pipe 1 and the connecting pipe 2. The connecting pipe 1 has an opening, and a sealing door 4 is hinged at the opening. A placement rack 55 is installed inside the connecting pipe 1, and a support bracket 6 for checking the circuit board is slidably installed on the placement rack 55.

[0034] In this embodiment, a fixing plate 7 is installed inside the second connecting pipe 2. The fixing plate 7 has a through hole and a fan is installed on the fixing plate 7. The fan blades are aligned with the through hole. A sealing shell 8 for a gas concentration detector is installed on the second connecting pipe 2. A placement rack 55 for placing the gas concentration analyzer is installed between the first connecting pipe 1 and the second connecting pipe 2.

[0035] In this embodiment, the connecting pipe 1, the connecting pipe 2, and the C-shaped pipes 3 at both ends of the connecting pipe 1 and the connecting pipe 2 are arranged in an elliptical shape.

[0036] In this embodiment, the connecting pipe 1 and the C-shaped pipe 3, and the connecting pipe 2 and the C-shaped pipe 3 are connected by bolts, and a sealing gasket is installed at the connection.

[0037] In this embodiment, an isolation plate 10 is installed at the connection between the connecting pipe 1 and the C-shaped pipe 3, at the connection between the connecting pipe 2 and the C-shaped pipe 3, and inside the connecting pipe 2. The isolation plate 10 has an installation hole, and a ventilation pipe 11 is installed in the installation hole.

[0038] In this embodiment, there are two openings on the specific connecting pipe 1, and the sealing door 4 is colorless and transparent.

[0039] In this embodiment, the specific support trays 6 are arranged in a stacked manner. The support trays 6 are provided with multiple slots 12 for placing circuit boards. The support trays 6 are communicatively connected to an external detection system.

[0040] In this embodiment, the specific sealing shell 8 is provided with a gas inlet 13, and a gas inlet 13 is installed with a gas delivery pipe connected to the gas cylinder.

[0041] In this embodiment, the specific connecting pipe 1 is provided with an exhaust port 14 and an air inlet 15, and both the exhaust port 14 and the air inlet 15 are equipped with solenoid valves.

[0042] In this embodiment, a protective shell 16 for protecting the communication cable is installed on the end face of the connecting pipe 1 away from the sealing door 4, and a protective shell 17 for connecting the air inlet pipe to the connecting pipe 2 is installed on the connecting pipe 2. In this embodiment, a bracket 18 for placing a blower is installed on the connecting pipe 2, and the blower installed on the bracket 18 is connected to the air inlet 15.

[0043] The steps for using this utility model in operation are as follows:

[0044] Insert and fix the circuit board of the combustible gas detector to be calibrated along the slot 12 of the support bracket 6 (the setting of multiple slots improves the detection efficiency), ensure good circuit contact, slide the support bracket 6 into the placement rack 5, close the sealing door 4, and ensure airtightness through the door lock or buckle.

[0045] Connect the gas pipeline by connecting the standard gas cylinder containing methane, propane, carbon monoxide and other gases to the gas inlet 13 of connecting pipe 2 through the gas pipeline, and confirm that there is no leakage at the interface;

[0046] The gas is passed through a gas concentration detector installed inside the sealed housing 8 to ensure that the gas concentration meets national standards.

[0047] The control system initializes by connecting the equipment power supply and sets parameters such as target gas concentration, fan speed, and blower power through an external control terminal.

[0048] Standard combustible gas flows into connecting pipe 2 through the sealed shell 8. At the same time, the fan is started to push the gas through the through hole of the fixed plate 7 into the annular pipe connecting pipe 2, then to the C-shaped pipe 3, then to the connecting pipe 1, then to the C-shaped pipe 3, and finally to the connecting pipe 2. The fan inside connecting pipe 2 is started to ensure that the gas concentration is uniform when passing through the circuit board. The system displays whether it is qualified. After the test is completed, it can be removed.

[0049] When the gas needs to be replaced, disconnect the original standard gas cylinder from the elliptical channel formed by the gas flow channel connecting pipe 1, connecting pipe 2, and C-type pipe 3 of this device. Then open the solenoid valves on the exhaust port and the air inlet, and turn on the blower on the bracket 18 to exhaust the original gas in the flow channel. Then introduce the required gas.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A threshold calibration test box for a combustible gas detector, comprising a first connecting pipe and a second connecting pipe, and C-shaped pipes installed at both ends of the first connecting pipe and the second connecting pipe, characterized in that, An opening is provided on the first connecting pipe, and a sealing door is hinged to the opening. A placement rack is installed inside the first connecting pipe, and a support bracket for inspecting the circuit board is slidably installed on the placement rack. A fixing plate is installed inside the second connecting pipe. A through hole is opened on the fixing plate. A fan is installed on the fixing plate. The fan blades are aligned with the through hole. A sealing shell for a gas concentration detector is installed on the second connecting pipe. A mounting rack for placing the gas concentration analyzer is installed between the first connecting pipe and the second connecting pipe.

2. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The connecting pipe one, connecting pipe two, and the C-shaped pipes at both ends of connecting pipe one and connecting pipe two are arranged in an elliptical shape.

3. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The first connecting pipe and the C-shaped pipe, and the second connecting pipe and the C-shaped pipe are connected by bolts, and a sealing gasket is installed at the connection.

4. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: An isolation plate is installed at the connection between the first connecting pipe and the C-shaped pipe, at the connection between the second connecting pipe and the C-shaped pipe, and inside the second connecting pipe. The isolation plate has an installation hole, and a ventilation pipe is installed in the installation hole.

5. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The connecting pipe has two openings, and the sealing door is colorless and transparent.

6. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The support brackets are arranged in a stacked manner, and each support bracket has multiple slots for placing circuit boards. The support brackets are communicatively connected to an external detection system.

7. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The sealing shell is provided with a gas inlet, and a gas supply pipe connected to the gas cylinder is installed on the gas inlet.

8. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: The connecting pipe is provided with an exhaust port and an air inlet, and both the exhaust port and the air inlet are equipped with solenoid valves.

9. The combustible gas detector threshold calibration test box according to claim 1, characterized in that: A protective shell is installed on the end face of the connecting pipe away from the sealing door to protect the communication cable, and a protective shell is installed on the connecting pipe to the connection position of the air inlet pipe.

10. A threshold calibration test box for a combustible gas detector according to claim 1, characterized in that: The connecting pipe 2 is equipped with a bracket for placing the blower, and the blower mounted on the bracket is connected to the air inlet.

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